package com.rewa.test.interceptor;

import com.rewa.test.annotations.PassToken;
import com.rewa.test.enums.ResultCode;
import com.rewa.test.exception.BusinessException;
import com.rewa.test.util.JwtUtils;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.lang.reflect.Method;
import java.util.Objects;

/**
 * @author tanfangping
 */
@Component
public class AuthenticationInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object object) throws Exception {
        // 从 http 请求头中取出 token
        String token = httpServletRequest.getHeader("token");
        // 如果不是映射到方法直接通过
        if(!(object instanceof HandlerMethod)){
            return true;
        }
        HandlerMethod handlerMethod=(HandlerMethod)object;
        Method method=handlerMethod.getMethod();
        //检查是否有passtoken注释，有则跳过认证
        if (method.isAnnotationPresent(PassToken.class)) {
            PassToken passToken = method.getAnnotation(PassToken.class);
            if (passToken.required()) {
                return true;
            }
        }
        // 执行认证

        if (token == null) {
            throw new RuntimeException("无token，请重新登录");
        }
        // 获取 token 中的 user id
        Long userId = JwtUtils.getUserId(token);
        if (Objects.isNull(userId)) {
            throw new BusinessException(ResultCode.TOKEN_ERROR);
        }
//            User user = userService.findUserById(userId);
//            if (user == null) {
//                throw new RuntimeException("用户不存在，请重新登录");
//            }
        return true;
        }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {

    }
    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

    }
}
